Low coverage rate and awareness of influenza vaccine among older people in Shanghai, China: A cross-sectional study
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Genming Zhao | Z. Li | C. Ye | Qiao Sun | Yuanping Wang | Hongmei Xu | L. Hao | Jianxing Yu | Jianxing Yu | Weiping Zhu | Wenbiao Hu | Wenbiao Hu